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1928 WH bolt locking up


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Hey guys I’m having an issue with my 1928 WH serial #634A that I was hoping someone may be familiar with. 
I have had a couple of instances where the bolt would only slide about 1/4 of the way forward and then lock up. The only way to get it free was to remove the full auto pin, safety pin and pin that holds the trigger on in order to free up the sear from the bolt so I could separate the lower from the upper. 
I couldn’t see any visible damage and other than the parts in the trigger being dirty it all seemed to go back together fine and functions properly. 
Has anyone else had this issue? 

Edited by Matt
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On a previous post you said the buffer pilot did not have a USGI manufacturer's mark and was probably a West Hurley product. Did you change that out before firing? Depending on the type of West Hurley buffer pilot you have, sometimes the flange will be loose on the shaft and cause issues. I am also curious if the actuator has a manufacturer's mark. Since you have taken the frame apart, check each part for a manufacture's part. I have heard the West Hurley Safety Levers will sometimes more around in the Sear and Sear levers and cause issues. If you're having functioning problems, these out of spec parts are the first thing to change out. 

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1 hour ago, Dpedersen said:

Make sure the semi/full auto rocker is facing to the rear as shown in the pic. If not, it will cause the bolt to lock up. 

image0.jpeg

I checked and it’s facing the correct direction. Thanks for the tip

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West hurley frequently have deep bolt pockets which means if you put the gun in semi auto, the rocker rises up and the bolt can travel over it which can then cause what you describe.  Confirm if this is happening when you have the gun in semi

 

 

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  • 2 weeks later...
On 5/12/2025 at 7:44 AM, deerslayer said:

West hurley frequently have deep bolt pockets which means if you put the gun in semi auto, the rocker rises up and the bolt can travel over it which can then cause what you describe.  Confirm if this is happening when you have the gun in semi

 

 

Sorry I’m just seeing this but I will definitely check that out. I feel like this must be the issue because the last time I took it out to shoot it it was locked up like this and the only time I mess with the firing selector is when I have cleaned it. 
thanks for the input. 
How would I go about fixing this issue? 

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deerslayer,

If someone were to manufacture an oversize actuator, would it be fairly easy for someone like you, or PK., or reconbob, or Got Uzi to fit the oversize actuator to the West Hurley receiver to achieve the proper clearance? 

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